Calculation of the test-retest reliability of scores between time periods is done for objective measures, not subjective measures.

Question

Quizplus · Accepted Answer

Test-retest reliability is a measure of the consistency of a test over time. It is calculated by administering the same test to the same group of people at two different time periods and then comparing the results. Objective measures are those that are based on observable facts, such as height, weight, or test scores. Subjective measures are those that are based on opinions or feelings, such as personality traits or attitudes. Test-retest reliability is only meaningful for objective measures, as subjective measures can change over time due to factors such as mood or experience.

Calculation of the Test-Retest Reliability of Scores Between Time Periods